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1041 lines
30 KiB
1041 lines
30 KiB
/* |
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* FFV1 codec for libavcodec |
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* |
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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/** |
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* @file ffv1.c |
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* FF Video Codec 1 (an experimental lossless codec) |
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*/ |
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|
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#include "avcodec.h" |
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#include "bitstream.h" |
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#include "dsputil.h" |
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#include "rangecoder.h" |
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#include "golomb.h" |
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|
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#define MAX_PLANES 4 |
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#define CONTEXT_SIZE 32 |
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|
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static const int8_t quant3[256]={ |
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0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0, |
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}; |
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static const int8_t quant5[256]={ |
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0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1, |
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}; |
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static const int8_t quant7[256]={ |
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0, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
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2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, |
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, |
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, |
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, |
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, |
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2, |
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-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1, |
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}; |
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static const int8_t quant9[256]={ |
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0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, |
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3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3, |
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-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1, |
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}; |
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static const int8_t quant11[256]={ |
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0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, |
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4, |
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-4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1, |
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}; |
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static const int8_t quant13[256]={ |
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0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, |
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4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6, |
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6, |
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6, |
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6, |
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-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5, |
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-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1, |
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}; |
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|
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static const uint8_t log2_run[32]={ |
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0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, |
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4, 4, 5, 5, 6, 6, 7, 7, |
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8, 9,10,11,12,13,14,15, |
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}; |
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|
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typedef struct VlcState{ |
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int16_t drift; |
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uint16_t error_sum; |
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int8_t bias; |
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uint8_t count; |
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} VlcState; |
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|
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typedef struct PlaneContext{ |
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int context_count; |
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uint8_t (*state)[CONTEXT_SIZE]; |
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VlcState *vlc_state; |
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uint8_t interlace_bit_state[2]; |
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} PlaneContext; |
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typedef struct FFV1Context{ |
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AVCodecContext *avctx; |
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RangeCoder c; |
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GetBitContext gb; |
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PutBitContext pb; |
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int version; |
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int width, height; |
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int chroma_h_shift, chroma_v_shift; |
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int flags; |
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int picture_number; |
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AVFrame picture; |
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int plane_count; |
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int ac; ///< 1-> CABAC 0-> golomb rice |
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PlaneContext plane[MAX_PLANES]; |
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int16_t quant_table[5][256]; |
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int run_index; |
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int colorspace; |
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|
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DSPContext dsp; |
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}FFV1Context; |
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static av_always_inline int fold(int diff, int bits){ |
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if(bits==8) |
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diff= (int8_t)diff; |
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else{ |
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diff+= 1<<(bits-1); |
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diff&=(1<<bits)-1; |
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diff-= 1<<(bits-1); |
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} |
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return diff; |
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} |
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static inline int predict(int_fast16_t *src, int_fast16_t *last){ |
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const int LT= last[-1]; |
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const int T= last[ 0]; |
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const int L = src[-1]; |
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|
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return mid_pred(L, L + T - LT, T); |
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} |
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static inline int get_context(FFV1Context *f, int_fast16_t *src, int_fast16_t *last, int_fast16_t *last2){ |
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const int LT= last[-1]; |
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const int T= last[ 0]; |
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const int RT= last[ 1]; |
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const int L = src[-1]; |
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|
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if(f->quant_table[3][127]){ |
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const int TT= last2[0]; |
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const int LL= src[-2]; |
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return f->quant_table[0][(L-LT) & 0xFF] + f->quant_table[1][(LT-T) & 0xFF] + f->quant_table[2][(T-RT) & 0xFF] |
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+f->quant_table[3][(LL-L) & 0xFF] + f->quant_table[4][(TT-T) & 0xFF]; |
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}else |
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return f->quant_table[0][(L-LT) & 0xFF] + f->quant_table[1][(LT-T) & 0xFF] + f->quant_table[2][(T-RT) & 0xFF]; |
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} |
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static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){ |
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int i; |
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|
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if(v){ |
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const int a= FFABS(v); |
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const int e= av_log2(a); |
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put_rac(c, state+0, 0); |
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|
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assert(e<=9); |
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|
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for(i=0; i<e; i++){ |
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put_rac(c, state+1+i, 1); //1..10 |
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} |
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put_rac(c, state+1+i, 0); |
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|
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for(i=e-1; i>=0; i--){ |
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put_rac(c, state+22+i, (a>>i)&1); //22..31 |
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} |
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|
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if(is_signed) |
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put_rac(c, state+11 + e, v < 0); //11..21 |
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}else{ |
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put_rac(c, state+0, 1); |
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} |
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} |
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|
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static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ |
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if(get_rac(c, state+0)) |
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return 0; |
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else{ |
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int i, e, a; |
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e= 0; |
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while(get_rac(c, state+1 + e)){ //1..10 |
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e++; |
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} |
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assert(e<=9); |
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|
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a= 1; |
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for(i=e-1; i>=0; i--){ |
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a += a + get_rac(c, state+22 + i); //22..31 |
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} |
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|
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if(is_signed && get_rac(c, state+11 + e)) //11..21 |
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return -a; |
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else |
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return a; |
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} |
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} |
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|
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static inline void update_vlc_state(VlcState * const state, const int v){ |
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int drift= state->drift; |
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int count= state->count; |
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state->error_sum += FFABS(v); |
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drift += v; |
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|
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if(count == 128){ //FIXME variable |
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count >>= 1; |
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drift >>= 1; |
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state->error_sum >>= 1; |
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} |
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count++; |
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|
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if(drift <= -count){ |
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if(state->bias > -128) state->bias--; |
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|
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drift += count; |
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if(drift <= -count) |
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drift= -count + 1; |
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}else if(drift > 0){ |
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if(state->bias < 127) state->bias++; |
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|
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drift -= count; |
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if(drift > 0) |
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drift= 0; |
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} |
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|
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state->drift= drift; |
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state->count= count; |
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} |
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|
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static inline void put_vlc_symbol(PutBitContext *pb, VlcState * const state, int v, int bits){ |
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int i, k, code; |
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//printf("final: %d ", v); |
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v = fold(v - state->bias, bits); |
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|
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i= state->count; |
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k=0; |
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while(i < state->error_sum){ //FIXME optimize |
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k++; |
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i += i; |
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} |
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|
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assert(k<=8); |
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|
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#if 0 // JPEG LS |
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if(k==0 && 2*state->drift <= - state->count) code= v ^ (-1); |
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else code= v; |
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#else |
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code= v ^ ((2*state->drift + state->count)>>31); |
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#endif |
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|
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//printf("v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code, state->bias, state->error_sum, state->drift, state->count, k); |
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set_sr_golomb(pb, code, k, 12, bits); |
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|
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update_vlc_state(state, v); |
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} |
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|
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static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state, int bits){ |
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int k, i, v, ret; |
|
|
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i= state->count; |
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k=0; |
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while(i < state->error_sum){ //FIXME optimize |
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k++; |
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i += i; |
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} |
|
|
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assert(k<=8); |
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|
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v= get_sr_golomb(gb, k, 12, bits); |
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//printf("v:%d bias:%d error:%d drift:%d count:%d k:%d", v, state->bias, state->error_sum, state->drift, state->count, k); |
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|
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#if 0 // JPEG LS |
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if(k==0 && 2*state->drift <= - state->count) v ^= (-1); |
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#else |
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v ^= ((2*state->drift + state->count)>>31); |
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#endif |
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|
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ret= fold(v + state->bias, bits); |
|
|
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update_vlc_state(state, v); |
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//printf("final: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
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static inline int encode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){ |
|
PlaneContext * const p= &s->plane[plane_index]; |
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RangeCoder * const c= &s->c; |
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int x; |
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int run_index= s->run_index; |
|
int run_count=0; |
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int run_mode=0; |
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|
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if(s->ac){ |
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if(c->bytestream_end - c->bytestream < w*20){ |
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av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
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return -1; |
|
} |
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}else{ |
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if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < w*4){ |
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av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
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return -1; |
|
} |
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} |
|
|
|
for(x=0; x<w; x++){ |
|
int diff, context; |
|
|
|
context= get_context(s, sample[0]+x, sample[1]+x, sample[2]+x); |
|
diff= sample[0][x] - predict(sample[0]+x, sample[1]+x); |
|
|
|
if(context < 0){ |
|
context = -context; |
|
diff= -diff; |
|
} |
|
|
|
diff= fold(diff, bits); |
|
|
|
if(s->ac){ |
|
put_symbol(c, p->state[context], diff, 1); |
|
}else{ |
|
if(context == 0) run_mode=1; |
|
|
|
if(run_mode){ |
|
|
|
if(diff){ |
|
while(run_count >= 1<<log2_run[run_index]){ |
|
run_count -= 1<<log2_run[run_index]; |
|
run_index++; |
|
put_bits(&s->pb, 1, 1); |
|
} |
|
|
|
put_bits(&s->pb, 1 + log2_run[run_index], run_count); |
|
if(run_index) run_index--; |
|
run_count=0; |
|
run_mode=0; |
|
if(diff>0) diff--; |
|
}else{ |
|
run_count++; |
|
} |
|
} |
|
|
|
// printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, (int)put_bits_count(&s->pb)); |
|
|
|
if(run_mode == 0) |
|
put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits); |
|
} |
|
} |
|
if(run_mode){ |
|
while(run_count >= 1<<log2_run[run_index]){ |
|
run_count -= 1<<log2_run[run_index]; |
|
run_index++; |
|
put_bits(&s->pb, 1, 1); |
|
} |
|
|
|
if(run_count) |
|
put_bits(&s->pb, 1, 1); |
|
} |
|
s->run_index= run_index; |
|
|
|
return 0; |
|
} |
|
|
|
static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){ |
|
int x,y,i; |
|
const int ring_size= s->avctx->context_model ? 3 : 2; |
|
int_fast16_t sample_buffer[ring_size][w+6], *sample[ring_size]; |
|
s->run_index=0; |
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer)); |
|
|
|
for(y=0; y<h; y++){ |
|
for(i=0; i<ring_size; i++) |
|
sample[i]= sample_buffer[(h+i-y)%ring_size]+3; |
|
|
|
sample[0][-1]= sample[1][0 ]; |
|
sample[1][ w]= sample[1][w-1]; |
|
//{START_TIMER |
|
for(x=0; x<w; x++){ |
|
sample[0][x]= src[x + stride*y]; |
|
} |
|
encode_line(s, w, sample, plane_index, 8); |
|
//STOP_TIMER("encode line")} |
|
} |
|
} |
|
|
|
static void encode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){ |
|
int x, y, p, i; |
|
const int ring_size= s->avctx->context_model ? 3 : 2; |
|
int_fast16_t sample_buffer[3][ring_size][w+6], *sample[3][ring_size]; |
|
s->run_index=0; |
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer)); |
|
|
|
for(y=0; y<h; y++){ |
|
for(i=0; i<ring_size; i++) |
|
for(p=0; p<3; p++) |
|
sample[p][i]= sample_buffer[p][(h+i-y)%ring_size]+3; |
|
|
|
for(x=0; x<w; x++){ |
|
int v= src[x + stride*y]; |
|
int b= v&0xFF; |
|
int g= (v>>8)&0xFF; |
|
int r= (v>>16)&0xFF; |
|
|
|
b -= g; |
|
r -= g; |
|
g += (b + r)>>2; |
|
b += 0x100; |
|
r += 0x100; |
|
|
|
// assert(g>=0 && b>=0 && r>=0); |
|
// assert(g<256 && b<512 && r<512); |
|
sample[0][0][x]= g; |
|
sample[1][0][x]= b; |
|
sample[2][0][x]= r; |
|
} |
|
for(p=0; p<3; p++){ |
|
sample[p][0][-1]= sample[p][1][0 ]; |
|
sample[p][1][ w]= sample[p][1][w-1]; |
|
encode_line(s, w, sample[p], FFMIN(p, 1), 9); |
|
} |
|
} |
|
} |
|
|
|
static void write_quant_table(RangeCoder *c, int16_t *quant_table){ |
|
int last=0; |
|
int i; |
|
uint8_t state[CONTEXT_SIZE]; |
|
memset(state, 128, sizeof(state)); |
|
|
|
for(i=1; i<128 ; i++){ |
|
if(quant_table[i] != quant_table[i-1]){ |
|
put_symbol(c, state, i-last-1, 0); |
|
last= i; |
|
} |
|
} |
|
put_symbol(c, state, i-last-1, 0); |
|
} |
|
|
|
static void write_header(FFV1Context *f){ |
|
uint8_t state[CONTEXT_SIZE]; |
|
int i; |
|
RangeCoder * const c= &f->c; |
|
|
|
memset(state, 128, sizeof(state)); |
|
|
|
put_symbol(c, state, f->version, 0); |
|
put_symbol(c, state, f->avctx->coder_type, 0); |
|
put_symbol(c, state, f->colorspace, 0); //YUV cs type |
|
put_rac(c, state, 1); //chroma planes |
|
put_symbol(c, state, f->chroma_h_shift, 0); |
|
put_symbol(c, state, f->chroma_v_shift, 0); |
|
put_rac(c, state, 0); //no transparency plane |
|
|
|
for(i=0; i<5; i++) |
|
write_quant_table(c, f->quant_table[i]); |
|
} |
|
#endif /* CONFIG_ENCODERS */ |
|
|
|
static av_cold int common_init(AVCodecContext *avctx){ |
|
FFV1Context *s = avctx->priv_data; |
|
int width, height; |
|
|
|
s->avctx= avctx; |
|
s->flags= avctx->flags; |
|
|
|
dsputil_init(&s->dsp, avctx); |
|
|
|
width= s->width= avctx->width; |
|
height= s->height= avctx->height; |
|
|
|
assert(width && height); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
static av_cold int encode_init(AVCodecContext *avctx) |
|
{ |
|
FFV1Context *s = avctx->priv_data; |
|
int i; |
|
|
|
common_init(avctx); |
|
|
|
s->version=0; |
|
s->ac= avctx->coder_type; |
|
|
|
s->plane_count=2; |
|
for(i=0; i<256; i++){ |
|
s->quant_table[0][i]= quant11[i]; |
|
s->quant_table[1][i]= 11*quant11[i]; |
|
if(avctx->context_model==0){ |
|
s->quant_table[2][i]= 11*11*quant11[i]; |
|
s->quant_table[3][i]= |
|
s->quant_table[4][i]=0; |
|
}else{ |
|
s->quant_table[2][i]= 11*11*quant5 [i]; |
|
s->quant_table[3][i]= 5*11*11*quant5 [i]; |
|
s->quant_table[4][i]= 5*5*11*11*quant5 [i]; |
|
} |
|
} |
|
|
|
for(i=0; i<s->plane_count; i++){ |
|
PlaneContext * const p= &s->plane[i]; |
|
|
|
if(avctx->context_model==0){ |
|
p->context_count= (11*11*11+1)/2; |
|
}else{ |
|
p->context_count= (11*11*5*5*5+1)/2; |
|
} |
|
|
|
if(s->ac){ |
|
if(!p->state) p->state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t)); |
|
}else{ |
|
if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState)); |
|
} |
|
} |
|
|
|
avctx->coded_frame= &s->picture; |
|
switch(avctx->pix_fmt){ |
|
case PIX_FMT_YUV444P: |
|
case PIX_FMT_YUV422P: |
|
case PIX_FMT_YUV420P: |
|
case PIX_FMT_YUV411P: |
|
case PIX_FMT_YUV410P: |
|
s->colorspace= 0; |
|
break; |
|
case PIX_FMT_RGB32: |
|
s->colorspace= 1; |
|
break; |
|
default: |
|
av_log(avctx, AV_LOG_ERROR, "format not supported\n"); |
|
return -1; |
|
} |
|
avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift); |
|
|
|
s->picture_number=0; |
|
|
|
return 0; |
|
} |
|
#endif /* CONFIG_ENCODERS */ |
|
|
|
|
|
static void clear_state(FFV1Context *f){ |
|
int i, j; |
|
|
|
for(i=0; i<f->plane_count; i++){ |
|
PlaneContext *p= &f->plane[i]; |
|
|
|
p->interlace_bit_state[0]= 128; |
|
p->interlace_bit_state[1]= 128; |
|
|
|
for(j=0; j<p->context_count; j++){ |
|
if(f->ac){ |
|
memset(p->state[j], 128, sizeof(uint8_t)*CONTEXT_SIZE); |
|
}else{ |
|
p->vlc_state[j].drift= 0; |
|
p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2); |
|
p->vlc_state[j].bias= 0; |
|
p->vlc_state[j].count= 1; |
|
} |
|
} |
|
} |
|
} |
|
|
|
#ifdef CONFIG_ENCODERS |
|
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ |
|
FFV1Context *f = avctx->priv_data; |
|
RangeCoder * const c= &f->c; |
|
AVFrame *pict = data; |
|
const int width= f->width; |
|
const int height= f->height; |
|
AVFrame * const p= &f->picture; |
|
int used_count= 0; |
|
uint8_t keystate=128; |
|
|
|
ff_init_range_encoder(c, buf, buf_size); |
|
// ff_init_cabac_states(c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64); |
|
ff_build_rac_states(c, 0.05*(1LL<<32), 256-8); |
|
|
|
*p = *pict; |
|
p->pict_type= FF_I_TYPE; |
|
|
|
if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){ |
|
put_rac(c, &keystate, 1); |
|
p->key_frame= 1; |
|
write_header(f); |
|
clear_state(f); |
|
}else{ |
|
put_rac(c, &keystate, 0); |
|
p->key_frame= 0; |
|
} |
|
|
|
if(!f->ac){ |
|
used_count += ff_rac_terminate(c); |
|
//printf("pos=%d\n", used_count); |
|
init_put_bits(&f->pb, buf + used_count, buf_size - used_count); |
|
} |
|
|
|
if(f->colorspace==0){ |
|
const int chroma_width = -((-width )>>f->chroma_h_shift); |
|
const int chroma_height= -((-height)>>f->chroma_v_shift); |
|
|
|
encode_plane(f, p->data[0], width, height, p->linesize[0], 0); |
|
|
|
encode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1); |
|
encode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1); |
|
}else{ |
|
encode_rgb_frame(f, (uint32_t*)(p->data[0]), width, height, p->linesize[0]/4); |
|
} |
|
emms_c(); |
|
|
|
f->picture_number++; |
|
|
|
if(f->ac){ |
|
return ff_rac_terminate(c); |
|
}else{ |
|
flush_put_bits(&f->pb); //nicer padding FIXME |
|
return used_count + (put_bits_count(&f->pb)+7)/8; |
|
} |
|
} |
|
#endif /* CONFIG_ENCODERS */ |
|
|
|
static av_cold int common_end(AVCodecContext *avctx){ |
|
FFV1Context *s = avctx->priv_data; |
|
int i; |
|
|
|
for(i=0; i<s->plane_count; i++){ |
|
PlaneContext *p= &s->plane[i]; |
|
|
|
av_freep(&p->state); |
|
av_freep(&p->vlc_state); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){ |
|
PlaneContext * const p= &s->plane[plane_index]; |
|
RangeCoder * const c= &s->c; |
|
int x; |
|
int run_count=0; |
|
int run_mode=0; |
|
int run_index= s->run_index; |
|
|
|
for(x=0; x<w; x++){ |
|
int diff, context, sign; |
|
|
|
context= get_context(s, sample[1] + x, sample[0] + x, sample[1] + x); |
|
if(context < 0){ |
|
context= -context; |
|
sign=1; |
|
}else |
|
sign=0; |
|
|
|
|
|
if(s->ac){ |
|
diff= get_symbol(c, p->state[context], 1); |
|
}else{ |
|
if(context == 0 && run_mode==0) run_mode=1; |
|
|
|
if(run_mode){ |
|
if(run_count==0 && run_mode==1){ |
|
if(get_bits1(&s->gb)){ |
|
run_count = 1<<log2_run[run_index]; |
|
if(x + run_count <= w) run_index++; |
|
}else{ |
|
if(log2_run[run_index]) run_count = get_bits(&s->gb, log2_run[run_index]); |
|
else run_count=0; |
|
if(run_index) run_index--; |
|
run_mode=2; |
|
} |
|
} |
|
run_count--; |
|
if(run_count < 0){ |
|
run_mode=0; |
|
run_count=0; |
|
diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits); |
|
if(diff>=0) diff++; |
|
}else |
|
diff=0; |
|
}else |
|
diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits); |
|
|
|
// printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, get_bits_count(&s->gb)); |
|
} |
|
|
|
if(sign) diff= -diff; |
|
|
|
sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1); |
|
} |
|
s->run_index= run_index; |
|
} |
|
|
|
static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){ |
|
int x, y; |
|
int_fast16_t sample_buffer[2][w+6]; |
|
int_fast16_t *sample[2]= {sample_buffer[0]+3, sample_buffer[1]+3}; |
|
|
|
s->run_index=0; |
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer)); |
|
|
|
for(y=0; y<h; y++){ |
|
int_fast16_t *temp= sample[0]; //FIXME try a normal buffer |
|
|
|
sample[0]= sample[1]; |
|
sample[1]= temp; |
|
|
|
sample[1][-1]= sample[0][0 ]; |
|
sample[0][ w]= sample[0][w-1]; |
|
|
|
//{START_TIMER |
|
decode_line(s, w, sample, plane_index, 8); |
|
for(x=0; x<w; x++){ |
|
src[x + stride*y]= sample[1][x]; |
|
} |
|
//STOP_TIMER("decode-line")} |
|
} |
|
} |
|
|
|
static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){ |
|
int x, y, p; |
|
int_fast16_t sample_buffer[3][2][w+6]; |
|
int_fast16_t *sample[3][2]= { |
|
{sample_buffer[0][0]+3, sample_buffer[0][1]+3}, |
|
{sample_buffer[1][0]+3, sample_buffer[1][1]+3}, |
|
{sample_buffer[2][0]+3, sample_buffer[2][1]+3}}; |
|
|
|
s->run_index=0; |
|
|
|
memset(sample_buffer, 0, sizeof(sample_buffer)); |
|
|
|
for(y=0; y<h; y++){ |
|
for(p=0; p<3; p++){ |
|
int_fast16_t *temp= sample[p][0]; //FIXME try a normal buffer |
|
|
|
sample[p][0]= sample[p][1]; |
|
sample[p][1]= temp; |
|
|
|
sample[p][1][-1]= sample[p][0][0 ]; |
|
sample[p][0][ w]= sample[p][0][w-1]; |
|
decode_line(s, w, sample[p], FFMIN(p, 1), 9); |
|
} |
|
for(x=0; x<w; x++){ |
|
int g= sample[0][1][x]; |
|
int b= sample[1][1][x]; |
|
int r= sample[2][1][x]; |
|
|
|
// assert(g>=0 && b>=0 && r>=0); |
|
// assert(g<256 && b<512 && r<512); |
|
|
|
b -= 0x100; |
|
r -= 0x100; |
|
g -= (b + r)>>2; |
|
b += g; |
|
r += g; |
|
|
|
src[x + stride*y]= b + (g<<8) + (r<<16); |
|
} |
|
} |
|
} |
|
|
|
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){ |
|
int v; |
|
int i=0; |
|
uint8_t state[CONTEXT_SIZE]; |
|
|
|
memset(state, 128, sizeof(state)); |
|
|
|
for(v=0; i<128 ; v++){ |
|
int len= get_symbol(c, state, 0) + 1; |
|
|
|
if(len + i > 128) return -1; |
|
|
|
while(len--){ |
|
quant_table[i] = scale*v; |
|
i++; |
|
//printf("%2d ",v); |
|
//if(i%16==0) printf("\n"); |
|
} |
|
} |
|
|
|
for(i=1; i<128; i++){ |
|
quant_table[256-i]= -quant_table[i]; |
|
} |
|
quant_table[128]= -quant_table[127]; |
|
|
|
return 2*v - 1; |
|
} |
|
|
|
static int read_header(FFV1Context *f){ |
|
uint8_t state[CONTEXT_SIZE]; |
|
int i, context_count; |
|
RangeCoder * const c= &f->c; |
|
|
|
memset(state, 128, sizeof(state)); |
|
|
|
f->version= get_symbol(c, state, 0); |
|
f->ac= f->avctx->coder_type= get_symbol(c, state, 0); |
|
f->colorspace= get_symbol(c, state, 0); //YUV cs type |
|
get_rac(c, state); //no chroma = false |
|
f->chroma_h_shift= get_symbol(c, state, 0); |
|
f->chroma_v_shift= get_symbol(c, state, 0); |
|
get_rac(c, state); //transparency plane |
|
f->plane_count= 2; |
|
|
|
if(f->colorspace==0){ |
|
switch(16*f->chroma_h_shift + f->chroma_v_shift){ |
|
case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break; |
|
case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break; |
|
case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break; |
|
case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break; |
|
case 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break; |
|
default: |
|
av_log(f->avctx, AV_LOG_ERROR, "format not supported\n"); |
|
return -1; |
|
} |
|
}else if(f->colorspace==1){ |
|
if(f->chroma_h_shift || f->chroma_v_shift){ |
|
av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n"); |
|
return -1; |
|
} |
|
f->avctx->pix_fmt= PIX_FMT_RGB32; |
|
}else{ |
|
av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n"); |
|
return -1; |
|
} |
|
|
|
//printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt); |
|
|
|
context_count=1; |
|
for(i=0; i<5; i++){ |
|
context_count*= read_quant_table(c, f->quant_table[i], context_count); |
|
if(context_count < 0 || context_count > 32768){ |
|
av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n"); |
|
return -1; |
|
} |
|
} |
|
context_count= (context_count+1)/2; |
|
|
|
for(i=0; i<f->plane_count; i++){ |
|
PlaneContext * const p= &f->plane[i]; |
|
|
|
p->context_count= context_count; |
|
|
|
if(f->ac){ |
|
if(!p->state) p->state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t)); |
|
}else{ |
|
if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState)); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static av_cold int decode_init(AVCodecContext *avctx) |
|
{ |
|
// FFV1Context *s = avctx->priv_data; |
|
|
|
common_init(avctx); |
|
|
|
return 0; |
|
} |
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size){ |
|
FFV1Context *f = avctx->priv_data; |
|
RangeCoder * const c= &f->c; |
|
const int width= f->width; |
|
const int height= f->height; |
|
AVFrame * const p= &f->picture; |
|
int bytes_read; |
|
uint8_t keystate= 128; |
|
|
|
AVFrame *picture = data; |
|
|
|
ff_init_range_decoder(c, buf, buf_size); |
|
ff_build_rac_states(c, 0.05*(1LL<<32), 256-8); |
|
|
|
|
|
p->pict_type= FF_I_TYPE; //FIXME I vs. P |
|
if(get_rac(c, &keystate)){ |
|
p->key_frame= 1; |
|
if(read_header(f) < 0) |
|
return -1; |
|
clear_state(f); |
|
}else{ |
|
p->key_frame= 0; |
|
} |
|
if(!f->plane[0].state && !f->plane[0].vlc_state) |
|
return -1; |
|
|
|
p->reference= 0; |
|
if(avctx->get_buffer(avctx, p) < 0){ |
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
|
return -1; |
|
} |
|
|
|
if(avctx->debug&FF_DEBUG_PICT_INFO) |
|
av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac); |
|
|
|
if(!f->ac){ |
|
bytes_read = c->bytestream - c->bytestream_start - 1; |
|
if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME |
|
//printf("pos=%d\n", bytes_read); |
|
init_get_bits(&f->gb, buf + bytes_read, buf_size - bytes_read); |
|
} else { |
|
bytes_read = 0; /* avoid warning */ |
|
} |
|
|
|
if(f->colorspace==0){ |
|
const int chroma_width = -((-width )>>f->chroma_h_shift); |
|
const int chroma_height= -((-height)>>f->chroma_v_shift); |
|
decode_plane(f, p->data[0], width, height, p->linesize[0], 0); |
|
|
|
decode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1); |
|
decode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1); |
|
}else{ |
|
decode_rgb_frame(f, (uint32_t*)p->data[0], width, height, p->linesize[0]/4); |
|
} |
|
|
|
emms_c(); |
|
|
|
f->picture_number++; |
|
|
|
*picture= *p; |
|
|
|
avctx->release_buffer(avctx, p); //FIXME |
|
|
|
*data_size = sizeof(AVFrame); |
|
|
|
if(f->ac){ |
|
bytes_read= c->bytestream - c->bytestream_start - 1; |
|
if(bytes_read ==0) av_log(f->avctx, AV_LOG_ERROR, "error at end of frame\n"); |
|
}else{ |
|
bytes_read+= (get_bits_count(&f->gb)+7)/8; |
|
} |
|
|
|
return bytes_read; |
|
} |
|
|
|
AVCodec ffv1_decoder = { |
|
"ffv1", |
|
CODEC_TYPE_VIDEO, |
|
CODEC_ID_FFV1, |
|
sizeof(FFV1Context), |
|
decode_init, |
|
NULL, |
|
common_end, |
|
decode_frame, |
|
CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/, |
|
NULL, |
|
.long_name= "FFmpeg codec #1", |
|
}; |
|
|
|
#ifdef CONFIG_ENCODERS |
|
AVCodec ffv1_encoder = { |
|
"ffv1", |
|
CODEC_TYPE_VIDEO, |
|
CODEC_ID_FFV1, |
|
sizeof(FFV1Context), |
|
encode_init, |
|
encode_frame, |
|
common_end, |
|
.pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_RGB32, PIX_FMT_NONE}, |
|
.long_name= "FFmpeg codec #1", |
|
}; |
|
#endif
|
|
|